Sight for firearms



33-2252. GR 194809048 SR Jan. 8, 1924. 1,480,048

H. G. DAVIS S IGHT FOR FIREARMS Filed April 24. 1922 .ffa'm/a 6. Davis.

tiEUME Patented Jan. 8, 1924.

UNITED STATES HAROLD G. DAVIS, OF DENVER, COLORADO.

SIGHT FOR FIREARMS.

Application filed April 24, 1922. Serial No. 556,324.

To all whom it may concern:

Be it known that I, HAROLD G. DAVIS, a citizen of the United States, residing at Denver, county of Denver, and State of Colorado, have invented certain new and useful Improvements in Sights for Firearms; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the ac companying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to sights for firearms and has special reference to means whereby the sight base may be lengthened whenever it is desired to obtain the maximum accuracy in shooting.

It is well known that the accuracy of rifles is in a large measure controlled by the distance between the front and rear sights which is sometimes referred to as the sight base or sight radius. It is well understood that a rifle which has a comparatively long sight base is a more accurate weapon than a revolver or pistol having a short sight base. The sights of the revolver must be lined up with exceedingly great accuracy in order to obtain the results that can be obtained by a rifle aimed with ordinary care.

It is the object of this invention to devise means whereby the sight base of a revolver can be more than doubled whenever it is desired to do accurate shooting. I accomplish this by placing the front sight on the end of a slide which operates in a dove tailed slot in the barrel and similarly securing the rear sight to a slide which moves in grooves provided therefor.

In order to more clearly describe my invention I shall have reference to the accompanying drawing in which- Fig. 1 is a perspective view of a revolver equipped with my improved sights.

Fig. 2 is a front view of the barrel lookin in the direction of the arrow 2 in Fig. 1.

Fig. 3 is a section taken on line 3-3 Fig. 1.

Fig. 4 is a section taken on line 4-4 Fig. 1.

Fig. 5 is a section similar to Fig. 4 but to an enlarged scale and Fig. 6 is a longitudinal vertical section of the barrel taken on a plane passing through the axis of the bore.

The same reference numerals will be used to indicate the same parts throughout the several views. Numeral 1 represents a revolver of an ordinary and well known construction and 2 represents the barrel thereof. As my invention refers exclusively to the sights I will not attempt any detailed description of the revolver as a whole but limit this description to my improvement. The top of the barrel 2 is provided longitudinally thereof with a slot 3 of dove tailed cross section in the bottom of which I provide a groove 4 which is best shown in Fi 6. A slide 5 of such size and shape as to t the slot 3 with a sliding fit is mounted so that it can be reciprocated in the slot: this slide carries a front sight 6 and is also provided with a pair of knobs 7 at its front end by means of which it can be grasped when it is desired to extend the slide to the position shown in Fig. 1. In order to prevent the slide from being pulled entirely out of the slot 3, I provide the lower side of the slide 5 with a notch 8 within which I place an upwardly bowed sprin 9 which is held in place by a screw 10. pring 9 slides in the groove 4 and when the slide 5 is pulled out the front end of the spring will engage the shoulder 11 of the groove and act as a stop for limiting the outward movement of the slide all as clearly shown in Fig. 6. The tension of the spring is such that it tends to raise the slide and therefore keeps the inclined surface of the slide and the slot in contact, thus compensating for wear.

hen the revolver is carried in the pocket or holster, the slide 5 is pushed back as far as it will go and is thus kept from being bent. In order to increase still further the sight base I mount the rear sight on the rear end of a slide which is composed of a pair of parallel members 13 and 14 which have their inner sides upwardly and outwardly inclined and which engage with slots 15 and 16 in the sides of the barrel. A bar 17 connects the front end of members 13 and 14 and prevents the same from spreading. In order to compensate for wear I provide a shim 18 between the side of member 14 and the side of the slot 16 and provide member 14 with two screws 19 and 20 by means of which the pressure of the shim against the side of the slot may be regulated. In order to prevent the slide carrying the rear sight 12 from being withdrawn entirely I provide a suitable stop 21 on the rear end of the revolver: this stop is so designed as to be engaged by the bar 17 and may be formed by a screw or other suitable means. hen the revolver is carried or when exact shooting is not desired, the rear sight may be slid forwardly until the transverse portion 22 engages the end of the frame. When the sights are collapsed, the revolver has the general appearance of any revolver and the same sight base, but when it is desired to do careful and exact shooting the sights both front and rear can be moved so as to greatly in crease the sight base, all as shown in Fig. 1,

From the above it is apparent that I have produced a revolver that is well adapted for fine shooting and which is so constructed that the sight base can be increased to fully twice that of an ordinary revolver of the same size. Although I have shown my improved sights in connection with an ordinary revolver, it is evident that the same principle may be employed in the construction of automatic pistols as well. It is also possible to apply the same principle to rifles, but of course the necessity is not so great in a rifle as the sight base is normally much greater than in a revolver.

Having now described my invention, what I claim is- 1. A firearm having a barrel having a dove tail groove in the outer surface and extending in a direction parallel to the. axis thereof, a slide in said groove, a stop means in said groove, a sight carried by said slide, means on said slide co-operating with the stop means in the groove to limit the movement of the slide with respect to the barrel. said barrel also having a pair of spaced grooves parallel with its axis, a slide in each groove, a sight carried by said slides, and

means for limiting the movement of the slides with respect to the barrel.

2. A firearm provided with a barrel having a longitudinal dove-tailed groove in the outer surface thereof, said groove having the bottom surface thereof grooved, said last named groove terminating in a shoulder near the front end of the barrel, a slide shaped to fit said first named groove and adapted to slide therein, a sight secured to said slide, a spring member secured to said slide and adapted to co-operate with the shoulder in the second named groove to form a stop, said barrel also having two grooves parallel with the first mentioned groove and arranged one on each side thereof. a slide having two parallel members adapted to cooperate with said last named grooves, the ends of said last named slide being connected to prevent spreading, one of said connectors co-operating with a stop on the barrel to prevent the slide from being withdrawn therefrom and a sight carried by the last named slide.

3. A firearm provided with a barrel having a longitudinal dovetailed groove in the outer surface thereof, said groove having the bottom surface thereof grooved, said last named groove terminating in a shoulder near the front end of the barrel, a slide shaped to fit said first named groove and adapted to slide therein, a sight secured to said slide, and stop means on the slide adapted to cooperate with the shoulder to limit the outward movement of the slide.

In testimony whereof I affix my signature.

HAROLD G. DAVIS. 

